Tongue for shuttle boxes in weaving looms



July 5, 1960 Filed NOV. 1, 1956 J. PICANOL TONGUE FOR SHUTTLE BOXES INWEAVING LOOMS 2 Sheets-Sheet 1 J. PLccLn ol, INVf/W'U/P mww July 5, 1960J. PICANOL 2,943,648

TONGUE FOR SHUTTLE BOXES IN WEAVING LOOMS Filed NOV. 1, 1956 2Sheets-Sheet 2 J P Lcanol/NVEIVO/P Fina-M W United States Patent TONGUEFOR SHUTTLE BOXES 1N WEAVING LOOMS Jaime Picanol, Casa Pairal Catalunya,Zillebeke-lez-Ypres, Belgium Filed Nov. 1, 1956, Ser. No. 619,787

Claims priority, application Belgium Dec. 17, 1955 '4 Claims. (Cl.139-185) This invention pertains to weaving looms. As is well known, itis an indispensable condition for the correct operation of a weavingloom, that the shuttle be guided throughout its course by a perfectlysmooth and even guiding surface. In other words, the shuttle must be soguided as to meet no irregularity or disturbing influence as it movesacross the loom. This condition is particularly necessary, when the loomis operated at higher speeds. In fact, such irregularities may giverise, especially at high operating speeds, to friction effects, changesof movement and generally speaking to all kinds of disturbing influencesendangering not only the normal operation of the looms but also themaking of flawless fabrics. However, the shuttle, right from the start,while it still is in the shuttle box, has, due to the action of thepicker motion, the tendency to strike against the guiding wall formed bythe floating dagger or swell and the rocking tongue. In prior artconstructions, the latter may cause a discontinuity in the lateral guidesurface of the shuttle. It follows that, the normal movement of theshuttle is disturbed at the very start, particularly if theloom isoperated at high speed, whereby the correct operation of the loom isimperilled. An object of the present invention is to eliminate thesedrawbacks of prior art constructions.

The invention relates to a certain arrangement of the rocking tongue andto means for adjusting the position of said tongue in such a way that,when said tongue is in its normal position, its front face lies exactlyin the plane of the polished shuttle-guiding surfaces and of the reedand is firmly maintained in this position, so that a perfectly even andcontinuous lateral guiding surface is provided. For this purpose, therocking tongue is so fitted and shaped as to hinge on a suitablydisposed pivot-as will be described in greater detail hereinafter.Furthermore, the tongue is provided with means permitting easyadjustment of its position, e.g. in the shape of a cam or eccentricbearing against a corresponding part of said tongue, the latter pressingagainst two points one of which is fixed and the other movable oradjustable, in such manner that said tongue may be secured at any momentin the correct position.

According to the invention, the pivot axis of the tongue is disposedbehind and-approximately-on a level with the corresponding end of thefront face aligned with the shuttle-guiding surfaces, in such mannerthat, when the returning shuttle contacts said rocking tongue, thelatter will not exert any detrimental resistance upon said shuttle.

This particular disposition as well as other features of the inventionwill be described in greater detail hereinafter with reference to theaccompanying drawings, wherein:

Figure l is a diagrammatic top view of the main elements of a weavingloom showing to locate the position of the improved tongue structureaccording to the invention;

Figures 2 and 3 show the rocking tongue in two char acteristicpositions;

Figure 4 shows diagrammatically the mechanism controlled by said tongueand I Figure 5 is a top view of a practical embodiment of the rockingtongue according to the invention.

The rocking tongue 1 has approximately the shape of an L, the horizontalleg being so arranged as to lie securely and exactly in the plane of theshuttle-guiding surfaces 9 and the reeds 10, whenever the shuttle is inthe shuttle box, whereas the vertical leg of said L-shaped tongue ismounted, at its free end, on a pivot 2; As is well known, the purpose ofthe shuttle-guiding surfaces 9 is to provide a perfect alinement betweenthe reeds 10 and the rear face of the shuttle boxes located upon theright and the left of the loom, beyond each surface 9. The surfaces 9are perfectly plane and along with the reeds and adjacent surfaces ofthe shuttle boxes they provide a perfectly continuous surface; thus theyserve as connection pieces between the reeds and the shuttle boxes toassure continuous guiding of the shuttle from ative position of thefront face of the rocking tongue requiring to be adjusted in the planeof the shuttle-guiding surfaces, and the lateral wall adjacent to saidfront face of said rocking tongue, and connecting said front face withsaid pivot 2. Consequently the pivoting center of the rocking tongueis-at least approximately-disposed on a line perpendicular to theshuttle race and extending through the point 3 of the front face of therocking tongue first met by the shuttle on its return into the shuttlebox. This location of the pivot 2 with respect to the front face of therocking tongue, more particularly with respect to the forward edge 3 ofsaid front face, is anessential feature of the present invention, sinceas a result thereof the manner in which the rocking tongue is acted uponby the returning shuttle is particularly eifective, the latterestablishing smoothly and progressively a contact with the former, inspite of the high speed of said shuttle.

As a means for correctly adjusting the position adopted by the rockingtongue when the shuttle is in the shuttle box, there is provided,according to the invention, a cam or eccentric 4 acting as a stop and asa brake for braking the movement of the returning shuttle. In order toalter the position of the line of contact between the eccentric 4 andthe rocking tongue it is merely necessary to rotate the eccentric 4about its axis, whereby the retracted position of the rocking tongue maybe adjusted with great precision. The rocking tongue acts in the usualway on the press button 5, the latter being connected by a lever 6 withthe stop rod nose 7, this mechanism being mounted on the batten 8 in theusual way (Figure 1).

Due to this arrangement, a lasting adjustment of the position of therocking tongue may be effected in a very simple manner, while thelatter, without losing anything in efficiency as a braking element forthe shuttle on its return into the shuttle box, is so constructed thatit will not disturb in any way whatsoever the movement of the shuttle,particularly during the start of the latter, when the rocking tongue isfirmly pressed against its pivot 2 and also against the eccentric stopelement 4.

It is obvious that the eccentric device may be replaced by any othertype of stop element, so long as such element permits shifting theposition of its contact line or contact surface with the rocking tongue,for the purpose of adjusting .the retracted poistion of the latter.Similarly many modifications in the detailed shape of the rocking tonguemay be made, provided its pivot point is rocking tongue might be usedindependently of the m'eans for adjustingthe position -*of 'said'tonguepand vice versa.

What I claim is: 1. In a weavingloom 'having a-batten, a shuttle 'racemounted on said batten; a shuttle-box -atteithen'sidet of! said batteneach at an .end bfsaid-'shuttle'race; means for projecting a shuttlealong said shuttle-race from one 2 of said .shuttleboxes-irito the-otherand viceversag: a

tongue, means pivotally supporting said tongue sidewaysn at the entrance:of. each' of said shuttle boxes so:as to cause said tongue to:partiallyproject into' the p athiof said shuttle when the latter is entering intosaid shuttle box and to brake the speedof said shuttle whileyieldingsideways thereto, while said shuttle is penetrating into said shuttlebox, the pivoting centreof saidfltongue being disposed on a linesubstantiallyperpendicular to.

said shuttle race and extending through that point of said tongue whichwill be first met by the shuttle, when the latter enters intosaidshuttle box.

2. In a weaving loom havinga batten, a reed mounted on said batten,shuttle-guiding surfaces on saidtbatten at either side of said reed anddisposed in a plane with one face of said reed, a shuttle race mountedon said batten in front of said plane. of .said,shuttleguidingsurfacesand said reed,.a shuttle box at eachend of said shuttle race, means forprojecting a shuttle along said shuttle race from one of said shuttleboxes into the other and vice versa, a tongue pivotally mountedsidewaysat the entrance of each of saidshuttle boxes and disposed so as topartially projectzinto the: path of said shuttle when the latter. entersinto said shuttle box. and to brake the speed of said shuttle whileyielding sideways there-- to while said shuttleis penetrating into. saidshuttle box,. said tongue having roughly the shape of'an:.L andcomprising a base part with ,asubstantially flat outer surface,

and an upright part substantially atqrightangles'with said flat outersurface and joining saidbase part at..such;.

point as will be first metyby the shuttle when therlatter enters intosaid shuttle box, said tongue being pivoted on a fixed part of saidbatten at a point adjacent said upright part of said tongue, and meansfor arresting the lateral yielding movement of said tongue in a positionwhereby said outer face of said base part is in a plane with saidshuttle-guiding surfaces, and said reed.

3. In a weaving loom having a batten, a reed mounted on said batten;shuttle guiding surfaces '.onsaid: batten at either side of said reedand disposed in a plane with one face of said reed, a shuttle racemounted on said batten in front of saidrplaneof said'shuttle guidingsurfaces and said reed, a shuttle box at each end of said shuttlerace,',means for projectingashuttle along said shuttle race from one ofsaid shuttle boxes into the other and 'viceversa; a-tonguepivotallymountedsideways at the entrance of eachof said. shuttles-boxes anddisposed so as to partially project into the path of said shuttle whenthe latter is entering into said shuttle box, and to brake the speed.ofsaid shuttle while-yielding sideways thereto while said'shuttle ispenetrating into saidshuttle box; the pivoting'centre of said tonguebeing disposed on a line substantially perpendicular to said shuttlerace .and going through such point. of said tongue as will be first metby the shuttle when the latter enters into said shuttle box, adjustablemeans for arresting the lateral yielding movement of said tongue,whereby the limit position of said tongue is precisely determined, saidstop means being such as to permit positional adjustment of its contactarea with said tongue, so as to permit bringing the outer face of saidtongue into a plane with said shuttle-guiding surfaces and saidreed.

4. Weaving loom as claimed in claim 3,.wherein said arresting meansis arotatably mounted cam device so shaped and so mounted'that, by. rotatingsaid cam device about its axis, thelineofv contact offered to saidtongue is. shifted.

References Cited in the file of this patent-- UNITED.STATES PATENTS2,253,097' Shimwell Aug; 19,1941 2,498,970 Taylor Feb.. 28,19502,525,129 Hageman Oct. '10, 1950 2,736,340 Sellas Feb; 28, 1956

